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Old 10-19-2005, 08:35 AM   #1
Kustom
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Join Date: Nov 2004
Location: hays, kansas
Posts: 20
th400 shifts fast

I just finished changing the 700R4 to a th400 in my 85 blazer. When I went out for the test drive it shifted through all of the gears very fast (by 30mph). The truck then lugs up to speed. Any ideas on what could cause this?
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1969 Chevy LWB 350, vortec heads, pro perf intake & powerglide
1985 Chevy K5 Blazer
1951 Buick 2 door HT; 350/350 combo, sub frame, disc brakes
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